sciencehabit writes: No single cause has yet been discovered for schizophrenia, the devastating neuropsychiatric syndrome characterized by hallucinations, disordered thoughts, and other cognitive and emotional problems, typically beginning in early adulthood. Although schizophrenia runs in families, in many cases no genetic risk is apparent, leading many researchers to look for environmental explanations. Now, research in mice provides support for a long-held hypothesis: that the syndrome, and other neurological disorders, can emerge when multiple environmental insults such as prenatal infection and adolescent trauma combine.